Question

tings bằng cách thuận tiện nhất

3,12 :0,25+3,12:0,2+3,12:0,5+3,12 x 89

Answer 1

`3,12:0,25+3,12:0,2+3,12:0,5+3,12xx89`

`=3,12xx4+3,12xx5+3,12xx2+3,12xx89`

`=3,12xx(4+5+2+89)`

`=3,12xx100 = 312`

Answer 2

\(3,12:\dfrac{1}{4}+3,12:\dfrac{1}{5}+3,12:\dfrac{1}{2}+3,12\times89\)

\(=3,12\times4+3,12\times5+3,12\times2+3,12\times89\)

\(=3,12\times\left(4+5+2+89\right)\)

\(=3,12\times100=312\)